Cooler.



A. E. ANDERSEN.

COOLER.

APPLIGATION FILED DEC. 21, 19m.

2 SHEETS-SHEET 1.

Lama

Patented Sept. 17, 1912.

A. E. ANDERSEN.

COOLER.

APPLICATION FILED DEG.21,1910.

Patented Sept. 17, 1912.

2 SHEETS-SHEET 2.

5 mm Moz inseam.

' NMARK, assumes no r. L. SMIDTE a 00.,

ALFRED E. ANDERSEN, 0F COPENHAGEN, DE

015 NEW YORK, N. Y., A COILPOEATIOH OF YORK.

COOIiER.

Specification of Letters Patent.

Patented Sept. 17, 1912.

To all whom it may concern:

a subject of the King of Denmark, residing "m Copenhagen, Denmark, haveinvented certain new and useful Improvements in {invention shown inFigs. 1 and 2, the improved cooling ap aratus comprises one or moredrums a, pre erably cylindrical, eccentrically disposed with respect toan axis'of revolution. If several drums or cylinders a :are provided,they should be symmetrically disposed about the axis of revolution. TheyCoolers, of which the following is a specification, reference being hadto the accompanying drawings, forming a part hereof.

Certain materials which have been subjected to great heat and must becooled, such, for example, as nodules of iron ore, magnesite and causticlime which has been burned in rotary kilns, sufl'er more or lessinjurious results when subjected to the acrin tion of ordinary coolersin which the material is repeatedly lifted and allowed to fall or inwhich it comes into too sudden contact with cold air or is cooled in thepresence of an excess of air. Thus, the nodules of iron ore are liableto be broken up and to form dust when cooled in an ordinary cooler, andmoreover under some conditions the nodules take up so much oxygen fromthe air as to offset to some extent the desirable reduction which hasbeen accomplished. Magnesite and possibly other minerals which have beenfused are also liable to be broken up to such an extent as to createdust not only through the mechanical action of the ordinary cooler, butalso through sudden contact with cold air. Caustic lime, dischargedhotfrom the rotary kilns in which it has been burned, may also take upcarbonic acid from the air when cooled in the ordinary manner.

Itis the object of this invention to overcome the objections which, forsuch materials as those referred to, are incident to the use of theordinary coolers and to produce a cooler which reduces as much aspossible the objectionable mechanical action of the ordinary coolers andalso permits of indirect cooling of the material, either partly orwholly out of contact with the cooling me.- dium.

The invention will be more full explained hereinafter with reference tot e accompanying drawings in which it is illustrated, and in which- 7.Figure 1 is a view in longitudinal section of a cooler constructed inaccordance with the invention. Fig. 2 is a partial view in section onthe planeindicated by the line 2--2 of Fig. 1.- Fig. 3 is a view similarto 'Fi Be it known that I, ALFRED E. ANDERSEN, bo

=tial view in section on the plane indicated by the line 44 of Fig. 3.

l but showing a slightly difierent emlment of the invention. Fig. 4 is apar- Referring first to the embodiment of the are mounted at their endsin end housings b I and c which may be provided with carrying d to restupon rollers (1' so that the entire structure may be rotated by anyconvenient means not necessary to be shown through which a chute 6 maybe projected to deliver the material to be cooled into the housing 6,from which it finds its way into the drums a through their open ends.The open end of the housing 6 is preferably inclosed by a wall j whichforms a chamber 1", through which the air, heated directly or indirectlyby exchange of heat with material to be cooled, ma be conducted away.The housing a, which material from the open ends of the drums at, ispreferably projected into a stationary cas ing 9 into which the materialis discharged from the housing a and from which it may in turn bedischarged into any desired re-. ceptacles, not shown.

herein. The housing I) has a marginal flange 6' around a central opening6,

receives the cooled Each of the drums a is surrounded by a jacket a, achamber a, being thereby formed chamber is open at'its discharge end, asat a, so that the heated air therein may be (hecharged into the housing6 and thence into At the rear end of the cooler an air pipe the c amberf.

between each drum and its jacket, which k, which may be connected with afan or other source of air or other cooling medium under pressure, ispro ected through the stationary casing g and is carried forwardcentrally between the 1 jacketed drums a, its forward end being closedin a plate It. At intervals along its length t e tube h is plzovidedwith ducts h, k, h which commumcate with the chamhers a between thedrums a and their jackthe tube 71. so as to control somewhat the dis-'tribution of the cold air and especially to prevent the immediatecontact of the cold air with those parts of the drums which are highlyheated by contact with the hot mate- 'rial discharged into the cooler.The tube h- -may also have openings h, provided with adjustable slidesh", through' which, if desired, a regulated quantity of the coolingmedium may be admitted directly into the housing 0 and thence into thedrums a, the cooling of the material being thus efiected by directcontact with the cooling medium. When the openings h are closed,however, the cooling of the material is effected indirectly and withoutactual contact with the air.

The embodiment of the invention shown in Figs. 3 and i is generallysimilar to that shown in Figs. 1 and 2, and like parts in the severalfigures are identified by like letters of reference. The dischargechamber 9 of the construction shown in Fig. 1, however, is omitted fromthe construction shown in Fig. 3', the material which is received by theopen ended housing 0 from the drums a being directly discharged fromsuch housing into any suitable receptacles. To prevent the immediateaccess of cold air tothe drums at from the openhousing 0, the rear endsof each drum are provided with cross walls 2' which have marginalopenings 2" in different relative positions. .In the revolution of thedrum about the axis of revolution the opening z" in some one of thecross walls i will be closed by the material which lies upon the lowerside of the drum and the direct access of cold air to the interior ofthe drum will thereby be prevented without in-' terfering seriously withthe travel of the cooled material outward through the openings in thecross Walls and from the drums into the housing 0.

It will now be understood that when the apparatus is rotated and heatedmaterial is delivered thereto at one end while air or other coolingmedium is supplied through the central pipe h, the material to becooled, which is discharged through the chute 6 into the housing bpasses thence into each drum a, as, in the course of its revolution, itreaches the lowest point, and then travels slowly through such drum, inthe continued revolution of the cooler, to the housing 0 whence it isdischarged. The inflowing material will become so piled in that drumwhich is receiving the same that an inclined floor will be formed by thematerial and an unbalanced force will be constantly tending to push thesame through the drum during the revolution of the same. The heatedmaterial, in its travel through the drums a, is not lifted and droppedbut travels always in contact with the wall of the drum which is cooledexternally by the cooling medium in the jacket (1 so that an exchange ofheat takes place between the heated material and the cooling medium. Asalready explained, the cooling of the material-is carriedon indirectlyand out of contact with the cooling medium unless the cooling medium ispurposely admitted to the interior of the drums.

- The apparatus has been described herein as a cooler for heatedmaterial, but obviously it provides 'for' an exchange of heat betweenmaterials of different temperatures and might be used for the heating ofone material as well as for the cooling of another material. In fact,the air or other cooling medium employed when heated by absorption ofheat from the hot material, may be conducted away from the apparatus andits heat may be made to serve some useful purpose.

Obviously the construction and arrangement of the apparatus may bevaried to suit different conditions of use and the invention, therefore,is not restricted to the precise constructions shown and describedherein.

I claim as my invention:

.1. A cooler comprising a longitudinal drum revoluble about an axis towhichit is eccentric, housings by which the drum 1s supported, ajacketabout the drum, means to deliver tothe drum through one of thehousings the material to be cooled, a central pipe for the coolingmedium extending throughout the length of the drum, and a plurality ofducts extending therefrom into the jacket of the drum intermediate theends of the latter.-

2. A cooler comprising revoluble end housings, longitudinal drumscarried by said housin s and symmetrically disposed about the axis ofrevolution, means to deliver to said drums through one of said housingsthe material to be cooled, jackets about said drums and a central pipeconnected with said jackets intermediate their ends to supply a coolingmedium.

3. A' cooler comprising a longitudinal drum revoluble about an axis towhich it is eccentric, housings by which the drum is supported, ajacketabout the drum, means todeliver to the drum through one of the housingsthe material to be cooled, a central pipe connected with said jacketintermediate its ends to supply a cooling medium, and means to admit alimited quantity of a cooling medium to said drum.

4. A cooler' comprising a longitudinal drum, a revoluble end housing bywhich the drum is supported for revolution about an axis to which it iseccentric, means to deliver to the drum through the housing the mate--charge of the cooled material is permitted rial to be cooled, a 'acketabout the drum, 'while the admission of air is limited. 10 means tosupply to t e jacket a cooling me- This specification signed andwitnessed dium, a plurality of partitions disposed inthis 29th day ofNovember A. D., 1910. V

5 teriorly of the drum adjacent its discharge ALFRED E. ANDERSEN.

end, a duct in each of said partitions so Signed in the presence of--disposed as to-be out of register with the CARL V. HENNIGE duct of theadjacent partition whereby dis- HANS CHR. NIELSEN.

